LG LMVM2277ST Product Training Manual page 123

Microwave Power
7.
To determine the power output multiply the temperature
rise by 70.
Example:
8. The output power of a microwave oven is greatly
affected by the voltage under load of the AC power
supply. Measure the voltage under load at the wall
receptacle where the oven is powered and operating.
The following chart shows the percentages of full
power that are within limits at voltages from 108 V
to 132 V
LMVM2277ST
70 x 14.5 = 1015 watts
. (See chart, next slide.)
AC
123
AC
T-36